Conveyer



F. G. LEWIS.L

coNvEYE APYPLICATION FILED JUNEZS. 1919.

Patented De@s 69 1921.

ml -Tnmuml nmunmmml Hummm! l UNITED STATES PATENT OFFICE. y

FRED G. LW'IS, DF SPOKANE, WASHINGTON, ASSIG'NOB T0 RHOADB HABVVESTEB 'iCOHPANY, 0F SPOKANE, .WASHINGTONZ come.

1,399,130. Spwiati of I -etters Patent. Patented Dec.' 6, 1921.

p'piication ned .rune 2s, 1919. serial no. 306,046.- To all may conem:the base and the latter pivoted at 7 to the Be it known that I, FRED'G.-Lam,

i citizen 4of the IUnited States, residing at Spokane, in the county. ofSpokane and State of Washington, have invented certain new and usefulImprovements in Conveyers, of which the following is a specification.

The present invention relates to improvements in conveyers of theadjustable leg type, or loaders for handling material in bulk, -asboxes, sacks, etc., and the invention is particularly applicable to themeans for lifting or adjusting the elevator and its supporting boom orframe to the desired or required position.

The primary object of the invention is i the provision of a compactlyarranged appliance that is simple both in construction andoperationwhereb the parts may be manipulated with facillty and accuracy, and inwhich the required functions are performed with efficiency. To this endthe invention consists in certain novel combinanism (not shown), andVbeing adjustable on after slet forth and claimed.

n t e accompanying drawings one complete example of the physicalembodiment of the invention is illustrated, the parts being combined andarranged according to the best mode so far devised for the practicalapplication of the principles of the invention. A

Figure l isa side view in elevation of a portable conveyer embodying thenovel v:fea-

tures of the present invention.

Fig. 2 is an enlarged,'sectional view of a part of the adjustableleg forswinging the boom or frame of the conveyer.

Fig. 3 is an enlarged sectional view showing the automatic reversing orshifting device forming part of the adjusting mechanism for theadjustable leg by which the boom is moved.

In the preferred form of the invention as illustrated in the drawings Ihave utilized a portable apparatus or appliance including the wheeledbase or platform lvupon which the boom2 is pivoted at 3, the boom beingof acceptable construction and frm to support the endless chain ofelevating mechaits pivot through the instrumentality of the adjustableor extensible leg illustrated.

The arkustable leg comprises two sections as 4 and the former beingpivoted at 6 on Athe pipe sections and hold the a guide sheave 9journaled in the en d cap or sleeve 10 of the lower section `of the leg,

and the diameters of these two leg sections are such as to provide aspace between them to accommodate the cable, as seen in Fig. 2.

The end of the cable is securely anchored or 4 attached to the lower endofthe upper section of the leg as seen in 2 where a filler block oranchoring block, in which the end of the rope is secured, is firmly heldinA a ring 12 fixed in-the lower end of the upper section. The boreY ofthis ring is eccentric to the bore of the pipe Sections, and the rope orcable passes through a' slot or opening 12 in the smaller section andthence bctween the two sections, up over its guide sheave, and thisarrangement of the eccentrically disposed anchoring block holds thesmaller sectionin position in the larger one to always provide the cable.space between arts stable.

The upper section maybe d 0r permitted to descend by action ofthe cableover the winding and unwin drum 13, .on the base 1, which isdriven thecountershaft 14 at Athe worm connection 15 in Fig. l

1, and the countershaftis revolved by either of the shift gears 16 or 17and the similar bevel gear wheel 18,through the driving mechanismincluding the wheel 19, belt 20 and motor 21, a shift lever22' beingillustrated for reversing the motion ofthe counter shaft in usualmanner. Y

In order that the dierential movement of the adjustable legmay bestopped or reversed, automatically, at the extreme of its movement in.either direction, a reversing mechanism is employed'inconnection Witthe countersha'ft 14, as best illustrated in Fig. 3. A comparativelylong sleeve 23 is Yfixed on the countershaft and threaded throughout itsgreater length, to form a screw bar for Athe traveling nut 24, which isnon-rotatable and guided through O-actlon with the spline or feather von the inner movement and that its reversing movements face of thetubular housing 26. The hous` may feather with 2 7', the grooves beingVsimilar to the guide roove of the traveling n-ut 24, and the bearingsare' integral with the fixed 'brackets 28 that are attached to the baseof the appligrooved bearing bushings 27, violent shock or jar to theappliance.

What I claim is- 1. The combination with the pivoted boom comprisingtelescoping sections 'pivoted reir Y i ance. The bushing 27 forms abearing forspectively to, the boom and said base, means lthe shaft whilethe bushing 27 forms a bearwithin the outer sectionfor holding the iningfor the screw bar fixed to the shaft, and it will read- Space inthe-outer section, means for' lifting 5,0

smooth portion of the sleeve or ner section in eccentric position toprovide a 'ily be apparent that the traveling nutfwhen it `'the uppersection and permitting it to slide reaches theextreme end of its lateralmoveinto the lower section comprising a winding ment will encounter oneor the other of the mechanism, a cable, and a pulley on the upbushings27 or 27', and the continued turnper end of the lower section, said"cable passing of vthe screw bar within' the'stationary ing through'saidspace over said pulley and 55 nut willl cause the shaft and sleeve toslide passing betweemthe telescoping sections, and longitudinally in,their bearings 27 27 a secured to the lower end of the upper'secsuicient distance to disconnec one of lthe tion within the lowersection. v bevel gears as 1 6 from itsy driving gear wheel 2. Thecombination with the base and- Y, 1,8. The adjustment may beaccomplished pivoted boom, of an adjustableleg compris- 60 manuallythrough the operating of the lever ing. hollow telescoping sectionspivoted re- 22 to -shift the bevel gears 16, 17, to stop or spectivelyon'the base and boom, a ring slidto reverse the drum in winding orunwindable inthe lower section and having an ecv ing the cablethereon,'and in this manner centric opening to receive the lower end oflthe eXtenslon' or contraction of the adjustthe upper section,ananchoringblock'in the 65 able leg may be controlled. By the-interlower end ofthe `upper sec'tionwithin said position of thereversing device on the counring and lower section, a cable anchoredintershaft a safety appliance is providedsaid block and passed through anopening v which will operate to throw the gears ofV in the lower end ofthe upper section and bethe drum out of mesh and discontinue movetweenouterand inner walls of the upper ment of the adjustable leg when thecon- 'and lower sections respectively, a guide() veyer boom' reaches.its maizimum of allowed pulley onthe'lower section, a windingmechmovement. l anismvfor the cable, and means for revers- 'l From theabove description it`will be apingthe mechanism'as described. parentthat the boom maylbe elevated, or In testimony wher-'coil aiix mysignature. 75 lowered, with facility and smoothness of V l LEWIS.

be accomplished, through the three piv- 40 ing is held rigid by theengagement of its ota-l points and the extensible leg, without and itsportable base, of an adjustable leg

